David K. Joyce

Rare Minerals

Unusual and rare minerals that I felt would be better here than in some other category! :)

All prices in Canadian dollars. For payment in US$, deduct 24% or multiply by 0.76.

Click on any of the following thumbnails to view a larger image of the specimen.

MerwiniteRare Minerals
  • Item #21931
  • Merwinite
  • 5.5x3.2x1.4 cm
  • Largest Crystal Size: 1mm
  • $35.00
  • Crestmore Quarry
  • Riverside County
    California, USA
  • Whitish crystals of this unusual calc-silicate mineral are embedded in this piece. Unusual.
ZunyiteRare Minerals
  • Item #21926
  • Zunyite
  • 6.6x4.3x2.8 cm
  • Largest Crystal Size: 1mm
  • $75.00
  • Big Bertha Mine
  • Quartzite
    Arizona, USA
  • This fragment of quartz.mica matrix contains many hundreds of colourless to beigey zunyite crystals. The crystals are very well formed and are, generally, combinations of cube and octahedron with the octahedron dominating some times. Rich sample with many sharp crystals.
Thomsenolite, Siderite, Sphalerite, RalstoniteRare Minerals
  • Item #20931
  • Thomsenolite, Siderite, Sphalerite, Ralstonite
  • 12.4x9.0x7.5 cm
  • Largest Crystal Size: 6mm
  • $425.00
  • Ivigtut Deposit
  • Ivittuut, Arsuk Fjord
  • There are cavities all over this specimen that are lined with superb, elongated, terminated thomsenolite crystals. Of course as is usually the case, the thomsenolite is white but has a light coating of iron oxide that give the specimen its classic look. Matrix appears to me massive thomsenolite with a few small siderite and sphalerite crystals embedded in it. As well, there are small cube-octahedral ralstonite crystals on the thomsenolite crystals, inside the vugs. We don't seem much of this material around any more!
RaiteRare Minerals
  • Item #21959
  • Raite
  • 3.8x2.8x2.0 cm
  • Largest Crystal Size: micro
  • $65.00
  • Indian Mountain
  • Kola Peninsula
  • There are many open spaces in this matrix that reveal beautiful crystal sprays of the rare Sodium-manganese-titanium silicate raite. There are supposed to be zorite crystals(?) in the cavities as well but I cannot recognize them. Maybe you can?! Very nice raite!
CarparthiteRare Minerals
  • Item #21937
  • Carparthite
  • 7.0x6.0x5.1 cm
  • Largest Crystal Size: 6mm
  • $65.00
  • Picacho Mine
  • San Benito Co.
    California, USA
  • This specimen has some openings that contain yellowish crystals of this unusual mineral that is composed of just carbon and hydrogen! Some nice crystals here!
StrengiteRare Minerals
  • Item #21945
  • Strengite
  • 4.3x2.5x1.6 cm
  • Largest Crystal Size: 0.5mm
  • $40.00
  • Indian Mountain
  • Cherokee County
    Alabama, USA
  • Beautiful well formed crystals are present both on the darker oxide matrix and as thicker covering on the other side of the specimen. Not all crystals are undamaged but there are many that are perfect and excellent for photography!
KleiniteRare Minerals
  • Item #21951
  • Kleinite
  • 5.8x3.0x3.2 cm
  • Largest Crystal Size: 1.5mm
  • $65.00
  • McDermit
  • Humboldt County
    Nevada, USA
  • Much of the front of this specimen is covered with rough but coherent crystals of kleinite. When I fist saw this mineral, I thought perhaps it was a uranium mineral, it is so yellow. No, it is a mercury mineral. Rare!
Felsobanyaite, GypsumRare Minerals
  • Item #21955
  • Felsobanyaite, Gypsum
  • 3.7x2.8x2.8 cm
  • Largest Crystal Size: n/a
  • $40.00
  • Chickerell
  • Dorset
  • OK, it is not pretty! It IS unusual, though! White aggregates of this unusual aluminum sulfate mineral intermixed with elongated growths of gypsum. Was labelled originally as "basaluminite", which is a pseudonym for felsobanyaite. Unusual!
UssingiteRare Minerals
  • Item #21961
  • Ussingite
  • 4.7x4.3x3.2 cm
  • Largest Crystal Size: n/a
  • $65.00
  • Mt. Punkurauj
  • Chibiny Massif, Kola Peninsula
  • A fragment of massive ussingite ranging from light mauve to purple. Rich!
TellurobismuthiteRare Minerals
  • Item #21991
  • Tellurobismuthite
  • 5.6x5.1x3.5 cm
  • Largest Crystal Size: 2mm cleavage
  • $45.00
  • Fyresdal

  • Norway
  • Lots of bright, lustrous cleavages of this unusual telluride scattered throughout this quartz matrix. Rich!
Brewsterite, BaryteRare Minerals
  • Item #21992
  • Brewsterite, Baryte
  • 3.5x3.4x2.2 cm
  • Largest Crystal Size: 2mm
  • $35.00
  • Strontian
  • Argyllshire
  • This thick plate has its top covered with white crested baryte crystals which have a generous sprinkling of sharp brewsterite crystals. There is sphalerite or wurtzite embedded in the matrix. From the type locality!
Clinoptilite-CaRare Minerals
  • Item #22167
  • Clinoptilite-Ca
  • 3.7x3.7x2.3 cm
  • Largest Crystal Size: 2mm
  • $45.00
  • Succor Creek

  • Oregon, USA
  • This geode-like, quartz nodule is hollow and completely lined with tabular, sharp, gemmy clinoptilite crystals. Excellent!
Sarabauite, StibniteRare Minerals
  • Item #22548
  • Sarabauite, Stibnite
  • 6.2x4.5x1.7 cm
  • Largest Crystal Size: n/a
  • $55.00
  • Sarabau Mine
  • Sarawak, Borneo
  • Rich, red sarabauite is associated with metallic stibnite, both being embedded in calcite and wollastonite. This is the type locality for this unusual antimony mineral!
EuxeniteRare Minerals
  • Item #22655
  • Euxenite
  • 1.9x1.3x0.5 cm
  • Largest Crystal Size: as above
  • $55.00
  • Ankazobe

  • Madagascar
  • A flattened cluster of slightly radioactive euxenite crystals. The crystals have a thin creamy alteration coating and an interior of resinous dark brown.
MendipiteRare Minerals
  • Item #22656
  • Mendipite
  • 3.7x2.2x1.2 cm
  • Largest Crystal Size: n/a
  • $45.00
  • Merehead Quarry
  • Mendip, Somerset
  • A solid zone of mendipite, the rare lead oxy-chloride mineral from the type locality.
Jamborite, SideriteRare Minerals
  • Item #22676
  • Jamborite, Siderite
  • 11.8x7.8x3.8 cm
  • Largest Crystal Size: 3mm
  • $75.00
  • Sterling Mine
  • Antwerp
    New York, USA
  • Sharp, acicular pseudomorphs of jamborite after millerite are tucked away here and there in interstices of this wide, shallow siderite crystal pocket. Classic Sterling Mine! R
Dawsonite, CalciteRare Minerals
  • Item #22797
  • Dawsonite, Calcite
  • 16.0x6.0x3.6 cm
  • Largest Crystal Size: 7mm
  • $65.00
  • St. Bruno
    Quebec, Canada
  • Masses of dawsonite fibers are present in fracture in this apparent limestone matrix. openings in the rock are lined with calcite rhombs. Unusual! R
Rosenbuschite, Eudialyte, AegirineRare Minerals
  • Item #25064
  • Rosenbuschite, Eudialyte, Aegirine
  • 7.0x4.0x4.8 cm
  • Largest Crystal Size: n/a
  • $75.00
  • Norra Karr,

  • Sweden
  • Some 1-2mm orangey-brown crystals of rosenbuschite are embedded in this nepheline-eudialite-aegirine rock. Rare!
Bayldonite, MimetiteRare Minerals
  • Item #25968
  • Bayldonite, Mimetite
  • 2.7x2.2x1.6 cm
  • Largest Crystal Size: micro
  • $45.00
  • Gold Hill Mine
  • Toole County
    Utah, USA
  • Lots of light green bayldonite crystals associated with white mimetite crystals on this gossanous matrix. Very good!
Boltwoodite, CalciteRare Minerals
  • Item #25993
  • Boltwoodite, Calcite
  • 2.9x2.4x2.3 cm
  • Largest Crystal Size: 3mm
  • $75.00
  • Swapkomund

  • Namibia
  • A couple of sprays of deep-yellow boltwoodite span this calcite crystal lined vug in massive calcite. Very nice example!
DawsoniteRare Minerals
  • Item #26258
  • Dawsonite
  • 3.7x3.9x1.2 cm
  • Largest Crystal Size: 8mm
  • $45.00
  • McGill University Excavation
  • Montreal
    Quebec, Canada
  • This specimen comes from an excavation for a building at McGill University in 2002 and is about as close to the type locality as you can get. The dawsonite is present in two fracture seams on two sides of the matrix. Excellent and unusual specimen!
Klebelsbergite, Sulphure, StibniteRare Minerals
  • Item #26394
  • Klebelsbergite, Sulphure, Stibnite
  • 6.9x4.7x2.6 cm
  • Largest Crystal Size: micro
  • $65.00
  • Pereta Mine
  • Grosetto, Tuscany
  • This specimen is predominately stibnitre crystal sections with openings between the stibnite crystals and, also, the matrix. In these openings are lots of yellow, gemmy crystals of native sulphure. As well, often there are whitish sprays of acicular klebelsbergite crystals. Excellent!
Fluor-buergeriteRare Minerals
  • Item #26445
  • Fluor-buergerite
  • 3.6x3.0x2.1 cm
  • Largest Crystal Size: 9mm
  • $65.00
  • San Luis Potosi

  • Mexico
  • Very sharp crystals of this relatively rare tourmaline group member seem to be embedded in red, common opal on volcanic matrix. The crystals are dark brown and have very sharp faces. Excellent example!
Molybdite, Quartz, MolybdeniteRare Minerals
  • Item #26453
  • Molybdite, Quartz, Molybdenite
  • 3.9x3.8x3.0 cm
  • Largest Crystal Size: micro
  • $65.00
  • Ferero Auro Mine

  • Bolivia
  • Lots of tiny, acicular, yellow crystals of this molybdenum oxide mineral between much bigger iron tinted quartz crystals. A clump of molybdenite at the base of the crystals.
StrengiteRare Minerals
  • Item #26494
  • Strengite
  • 8.5x7.0x4.6 cm
  • Largest Crystal Size: micro
  • $45.00
  • Indian Mountain
  • Cherokee County
    Alabama, USA
  • This matrix has clusters of strengite exposed in iron-oxide rich seams on a large portion of its surface. An od label that accompanies the specimens says there is also laubmannite, dufresnite and Rockbridgite on the specimen. I'm not all that familiar with these phosphates, so I'll leave those up to you! :) There IS nice strengite!!